Except you still get money and the money still goes somewhere, the credit is worth real money, they can store and get real money out of it even if it's not physically money like checks.

The idea he is saying that there is infinite supply of money, the job givers have infinite money. Stores can receive money and it doesnt go anywhere except occasionally goes to the owners of the areas base.

The materials you obtain for selling such as flowers and shells do not get stored anywhere. There is no limit of these resources.

Thus there is no economy. The government in the game doesn't need money to run, no taxes, no nothing.